期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 181, 期 8, 页码 1731-1737出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.03.036
关键词
lanthanide coordination polymer; 2,5-pyridinedicarboxylate; structure; photoluminescent property
资金
- National Natural Science Foundation of China [20671072]
Four new open-framework Coordination polymers of lanthanide 2,5-pyridinedicarboxylates, with the formulas Pr2(pydc)(3)(H2O)(2) (1), Ln(pydc)(Hpydc) (Ln = Tb (2), Er (3). Eu (5)). and Gd(pydc)(nic)(H2O) (4) (H(2)pydc = 2,5-pyridinedicarboxylic acid, Hnic = nicotinic acid), have been hydrothermally synthesized and four of them (except Eu (5)) have been structurally characterized. Complex 1 consists of two types of ligand-binding modes contributing to link the PrO7N(H2O) polyhedral chains to three-dimensional (3D) open-framework architecture. Complexes 2 and 3 are isostructural and feature unique 3D cage-like supramolecular frameworks remarkably different from that of 1, owing to the different ligand-bridging pattern. Complex 4, however, has the distinct 3D open-framework architecture due to the presence of unexpected nicotinate ligands, which may be derived from pydc ligands via in-situ decarboxylation under the hydrothermal condition. (C) 2008 Elsevier Inc. All rights reserved.
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